Jacob a



No Model.) I J. A. PAINTER.

GENTERING DEVICE.

No. 404,858. Patented June 11, 1889.

. UNITED STATES PATENT OFFICE.

JACOB A. PAINTER, OF DECATUR, ILLINOIS, ASSIGNOR OF ONE-HALF 'IO CHARLES M. ALLISON, OF SAME PLACE.

CENTERING DEVICE.

SPECIFICATION forming part of Letters Patent No. 404,858, dated June 11, 1889. Application filed December 19, 1888- Serial No. 294,061. (No model.)

To all whom it may concern.-

Be it known that I, JAcoB A. PAINTER, of the city of Decatur, county of Macon, and State of Illinois, have invented a certain new and useful Centering Device, of which the following is a specification.

My invention relates to devices for centering the ends of shafts; and it consists in the details of construction and combinations of parts, hereinafter set forth and claimed.

In the drawings accompanying and forming a part of this specification, Figure 1 is a perspective view of my device, and Fig. 2 is a plan of certain details under conditions to be hereinafter explained.

Quadrilateral gage-frames are formed of bars a a and b b, hinged together at their ends. Two such frames are held in parallel planes by strut-bolts '6 i. A punch-guide frame c is pivotally secured at ff to opposite bars of the upper gage-frame, and is provided with guide 9 for punch h, said punch being located midway between pivots f f. At (Z (Z ends offramebars are pivotally connected. At 0 0 ends of bars are pivotally connected together and to the strut-bolts. All the bars of the gageframes extend beyond their pivots at c c and form angles slightly obtuse. The angular terminations of bars a are shown at a. Those of bars I) are shown at Z).

In Fig. 2 the upper gage-frame is shown adapted to ashaft of small diameter, and the bars I) are placed above bars a to more clearly show the former. Reference-letters f in said figure show holes for pivotal attachment for the punch-frame, said holes being midway between and in line with pivots c and d.

The inner edges of the gage-'frai'nes form parallelograms. The punch acts in a line precisely central with relation to the parallelograms. The angles formed by bars a b with their extensions are equal one to another and approximate one hundred and fifty degrees.

WVhen the device is used on a shaft as large or larger than that indicated by dotted lines in Fig. 1, the edges of the bar bear against the surface of the shaft. When a smaller shaft is centered, the extensions provide the gage-bearing, as suggested in Fig. 2. In this case the bars form angles so obtuse that accurate adjustment cannot be obtained by and as the bearings are taken well back of the ends of shafts it will be understood that battered or misshapen ends may be centered as accurately as true ones.

I claim as new and desire to secure by Letters Patent 1. In a centering device, the combination comprising a hinge jointed quadrilateral frame and a pnnch-guidehinged to the frame, as set forth. a

2. A centering device comprising two or more hinge-jointed quadrilateral frames held parallel by strut-bolts, and a punch-guide hinged to one of the frames, as set forth.

3. In a centering device, in combination, hinge-jointed bars a a and b I), having the angular extensions a' a and b b, and punchguide frame 6, pivotally connected with opposite bars, as set forth.

4. In a centering device, in combination,

the hinged frames comprising the bars aa and I) I), having angular extensions a a b"b', strut-bolts t L, holding the frames parallel, and punch-guide e g, hinged to opposite bars,

as set forth.

JACOB A. PAINTER. Aitest:

I. D. WALKER, C. H. WAL'rEEs. 

